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containerd vs Docker: What are the differences?

What is containerd? An industry-standard container runtime with an emphasis on simplicity,robustness and portability. An industry-standard container runtime with an emphasis on simplicity, robustness, and portability.

What is Docker? Enterprise Container Platform for High-Velocity Innovation. The Docker Platform is the industry-leading container platform for continuous, high-velocity innovation, enabling organizations to seamlessly build and share any application ‚ÄĒ from legacy to what comes next ‚ÄĒ and securely run them anywhere.

containerd belongs to "Container Tools" category of the tech stack, while Docker can be primarily classified under "Virtual Machine Platforms & Containers".

Some of the features offered by containerd are:

  • OCI Image Spec support
  • OCI Runtime Spec support (aka runC)
  • Image push and pull support

On the other hand, Docker provides the following key features:

  • Integrated developer tools
  • open, portable images
  • shareable, reusable apps

Docker is an open source tool with 54K GitHub stars and 15.6K GitHub forks. Here's a link to Docker's open source repository on GitHub.

Decisions about containerd and Docker
Florian Sager
Florian Sager
IT DevOp at Agitos GmbH · | 2 upvotes · 306 views
Chose
LXDLXD
over
DockerDocker

lxd/lxc and Docker aren't congruent so this comparison needs a more detailed look; but in short I can say: the lxd-integrated administration of storage including zfs with its snapshot capabilities as well as the system container (multi-process) approach of lxc vs. the limited single-process container approach of Docker is the main reason I chose lxd over Docker.

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- No public GitHub repository available -

What is containerd?

An industry-standard container runtime with an emphasis on simplicity, robustness, and portability

What is Docker?

The Docker Platform is the industry-leading container platform for continuous, high-velocity innovation, enabling organizations to seamlessly build and share any application ‚ÄĒ from legacy to what comes next ‚ÄĒ and securely run them anywhere
Why do developers choose containerd?
Why do developers choose Docker?
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      What companies use containerd?
      What companies use Docker?

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      What tools integrate with containerd?
      What tools integrate with Docker?
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        What are some alternatives to containerd and Docker?
        rkt
        Rocket is a cli for running App Containers. The goal of rocket is to be composable, secure, and fast.
        Kubernetes
        Kubernetes is an open source orchestration system for Docker containers. It handles scheduling onto nodes in a compute cluster and actively manages workloads to ensure that their state matches the users declared intentions.
        LXC
        LXC is a userspace interface for the Linux kernel containment features. Through a powerful API and simple tools, it lets Linux users easily create and manage system or application containers.
        Docker Compose
        With Compose, you define a multi-container application in a single file, then spin your application up in a single command which does everything that needs to be done to get it running.
        Rancher
        Rancher is an open source container management platform that includes full distributions of Kubernetes, Apache Mesos and Docker Swarm, and makes it simple to operate container clusters on any cloud or infrastructure platform.
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        Interest over time
        Reviews of containerd and Docker
        Avatar of gdi2290
        Co-Founder and CTO at Tipe
        Review ofDockerDocker

        Docker is the new kid on the block disrupting virtualization nowadays. You're able to save up to 70% of your development cost on AWS (or any other cloud) switching to Docker. For example instead of paying for many small VMs you can spin up a large one with many Docker containers to drastically lower your cost. That alone is only one of the reasons why Docker is the future and it's not even the best feature: isolation, testa­bil­i­ty, re­pro­ducibil­i­ty, standardization, security, and upgrading / down­grad­ing / ap­pli­ca­tion versions to name a few. You can spin up 1000's of Docker containers on an ordinary Laptop, but you would have trouble spinning up 100's of VMs. If you haven't already checked out Docker you're missing out on a huge opportunity to join the movement that will change development/production environments forever

        Review ofDockerDocker

        The support for macOS is a fake.

        I can't work with docker in macOS because de network and comunications with the container don't works correctly.

        How developers use containerd and Docker
        Avatar of ssshake
        ssshake uses DockerDocker

        Currently experimenting. The idea is to isolate any services where I'm not confident yet in their security/quality. The hope is that if there is an exploit in a given service that an attacker won't be able break out of the docker container and cause damage to my systems.

        An example of a service I would isolate in a docker container would be a minecraft browser map application I use. I don't know who wrote it, I don't know who's vetting it, I don't know the source code. I would feel a lot better putting this in a container before I expose it to the internet.

        I believe I will follow this process for anything that's not properly maintained (not in an trusted apt-repo or some other sort of confidence)

        Avatar of AngeloR
        AngeloR uses DockerDocker

        We are testing out docker at the moment, building images from successful staging builds for all our APIs. Since we operate in a SOA (not quite microservices), developers have a dockerfile that they can run to build the entirety of our api infrastructure on their machines. We use the successful builds from staging to power these instances allowing them to do some more manual integration testing across systems.

        Avatar of Yaakov Gesher
        Yaakov Gesher uses DockerDocker

        Each component of the app was launched in a separate container, so that they wouldn't have to share resources: the front end in one, the back end in another, a third for celery, a fourth for celery-beat, and a fifth for RabbitMQ. Actually, we ended up running four front-end containers and eight back-end, due to load constraints.

        Avatar of sapslaj
        sapslaj uses DockerDocker

        Linux containers are so much more lightweight than VMs which is quite important for my limited budget. However, Docker has much more support and tooling for it unlike LXC, hence why I use it. rkt is interesting, although I will probably stick with Docker due to being more widespread.

        Avatar of Packet
        Packet uses DockerDocker

        We are running primarily as a micro-services platform and Docker lets us iterate on these smaller units consistently from dev to staging to production. It is also integral to our continuous deployment system for rolling out or rolling back new features.

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        How much does Docker cost?
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